Dark Side of the Universe with Dr. Erica Ellingson Sept. 28, 7:30 pm $7 for adults, $5 for students/faculty with ID, and $3.50 for children and seniors To preorder tickets, call 303-492-5002. Learn how we came to believe that most matter in the universe is in an unknown, invisible form, and that the universe is accelerating its expansion due to a mysterious "dark" energy. Along the way, we'll explore Einstein's relativity, Hubble's greatest discovery, and the research that won the 2011 Physics Nobel Prize.